textproduct: Quad Cities

KEY MESSAGES

- Above normal temperatures remain forecast through the period with high temperatures peaking in the lower to mid 90s Tuesday through the end of the week. There is a 10 to 20 percent chance of heat indices over 100 Tuesday through Thursday. - Forecast remains dry through Thursday with low chances of rain Friday and Saturday.

SHORT TERM /THROUGH TONIGHT/

Issued at 123 AM CDT Sun Jul 12 2026

High pressure is forecast to sit across the area through tonight with clear skies and light winds of 5 to 10 MPH. High temperatures today will warm by 1 to 2 degrees from yesterday with widespread mid to upper 80s. Easterly winds will keep dewpoints in the 60s today resulting in comfortable humidity. Low temperatures tonight are once again expected to be in the mid 60s.

LONG TERM /MONDAY THROUGH SATURDAY/

Issued at 123 AM CDT Sun Jul 12 2026

Broad high pressure is forecast to sit across the central Plains to start the long term on Monday. Closed 500 mb heights will expand eastward across the region through midweek as a Rex Block develops with closed low pressure developing in the Gulf states. High pressure is then forecast to remain in place through Wednesday. This results in a gradual warming of temperatures each day of the upcoming week. High temperatures are forecast to be in the lower to mid 90s through this stretch. Despite being in peak evapotranspiration models continue to keep the dew points around 70 during the period. These dew points and temperatures have been keeping forecast heat indices in the mid to upper 90s. During this period there is a 10 to 20 percent chance that heat indices will exceed 100 degrees mainly along and east of the Mississippi River. The current forecast shows this occurring for an hour or two each day.

Beyond Thursday, operational models and ensembles show a retrograde of the Rex Block for the end of the week with high pressure shifting into the Rocky Mountains and low pressure over the Desert Southwest. This retrograde moves the jet stream farther to the west over the Upper Midwest and Great Lakes. Friday into Saturday of next week, the large spread in the NBM MaxT interquartile ranges (25th-75th percentile) of up to 13 degrees depict the uncertainty and differences in the placement of these features. Despite the jet stream being closer the better chances for precipitation remain to the north and east of the area.

AVIATION /12Z TAFS THROUGH 12Z MONDAY/

Issued at 540 AM CDT Sun Jul 12 2026

VFR conditions are expected to persist through the TAF period. Patchy river valley fog will be found early this morning and is possible again late tonight, but overall probability for impacts at the terminals is too low (<20%) for any mention. Winds look to increase to 6-12 kt from the E/NE today, and then become light and variable once again tonight.

DVN WATCHES/WARNINGS/ADVISORIES

IA...None. IL...None. MO...None.